$(document).ready(function(){
	  $("#tab_1 .center_car").mouseover(function () {   
		 $("#tab_1 .center_car_a").css("z-index","5"); 
    });
	
	 $("#tab_1 .center_car_a").mouseout(function () { 
		 $(this).css("z-index","3"); 
    });
	
	  $("#tab_2 .center_car").mouseover(function () {   
		 $("#tab_2 .center_car_a").css("z-index","5"); 
    });
	
	 $("#tab_2 .center_car_a").mouseout(function () { 
		 $(this).css("z-index","3"); 
    });
	
	
	 $(".left_car").click(function () { 
		 $("#tab_1").css("display","block"); 
		 $("#tab_2").css("display","none"); 
    });
	 $(".right_car").click(function () { 
		 $("#tab_2").css("display","block"); 
		 $("#tab_1").css("display","none"); 
    });
	
	
 });